Hoisting machinery for elevators



Dec. 8, 1931. s; E. BUETTELL HOISTING MACHINERY FOR ELEVATORS Filed Nov. 5, 1928 2 Sheets-Sheet 2 Patented Dec. 8, 1931 UNITED STATES PATENT OFFICE SAMUEL E. BUETTELL, OF CHICAGO, ILLINOIS, ASSIGNOR T CROSS PARKING SYSTEMS, INC OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS HOISTING MACHINERY FOR ELEVATORS Application filed November The present invention relates in general to elevator'hoisting machines and more particularly to such machines as are adapted to hoist relatively heavy loads by means of a oco'mparatively large hoisting platform.

One of the objects of the invention is to provide an elevator hoisting machine that is particularly adapted for use in an automatic garage system of the type exemplified in the copending application of Samuel E. Buettell,

Serial #276,931, filed May 11, 1928.

Another object is to provide an elevator hoisting machine in which access may be had to the elevator platform from three sides.

Another object is to provide an improved elevator hoisting machine in which the load is more evenly distributed so that lighter cage construction may be employed.

Another object is to provide a hoisting ar- 'rangement in which the possibility of the hoisting cables creeping is reduced to a minimum.

l A still further object of the invention is to provide a novel braking mechanism for the 'hoisting units so that the factor of safety is increased.

There are other objects of the invention, which together with the foregoing, will be de- 7 scribed in the detailed specification, which is -tojfollow, taken in conjunction with the accompanying drawings.

As mentioned before, while the elevator hoisting machinery is particularly adapted to work with an elevator cage constructed so that access may be had from three sides to facilitate the handling of automobiles in a mechanical garage, it is not limited to this particular application. The prior application, mentioned above illustrates-an auto- 3 matic garage system for use in lower storage The improved Serial No. 317,450.

hoisting mechanism of the present invention is adapted to reduce the weight of the elevator cage structure and to distribute the load with the result that the structure may be lightened.

In practicing my invention I provide elevator hoisting machinery in the pent house, comprising a motor that is adapted to drive twohoisting sheaves, the motor being positioned between the hoisting sheaves, through standard spur gear, reducing mechanism. Two sets of hoisting cables are attached to the elevator cage and run to separate counterweights over the respective driving sheaves. By the use of tl ese double driving sheaves a hoisting load is more evenly distributed, as will appear.

Referring now to the drawings:

Fig. 1 is a plan view of an elevator hoisting mechanism in the pent house, illustrating theoutline of the hatch, position of the counterweights and elevator guide rails;

Fig. 2 is a sectional elevation through a portion of the building, along line 2-2 of Fig. 1, showing the construction of the elevator cage.

Like reference characters in the various figures refer to similar parts.

The reference character 3 designates a bed plate upon which the hoisting apparatus is mounted. A motor 4 of any desired power is suitably aflixed thereto and is provided with a shaft 5 that extends on either side thereof to two coupling brakes 6 and 7 which serve to couple the shaft 5 with the spur gear speed 85 reducing mechanisms 8 and 9. The coupling brakes 6 and 7 may be of any well known construction, as may the speed reducing mechanisms 8 and 9. The speed reducing mechanisms 8 and 9 serve to transmit power to the shafts l0 and 11 respectively, the ends of which rotate in suitable bearings 12 and 13, mounted upon the bed plate 3. Two driving sheaves le and 15 of any desired construc tion are mounted upon the shafts l0 and 11 respectively. Two drum brakes16 and 17 are positioned between the speed reducing mechanisms and the driving sheaves in the manner shown. These drum brakes are adapted to grip cooperating drums 18 and 19 aflixed to or integral with the driving sheaves 14 and 15. A set of hoisting cables 20 and 21 is passed over each driving sheave 14 and 15 and connect with the elevator hitch 5 beam 22 and with counterweights 23 and 24. The hoisting cables may be attached to the elevator hitch beam '22 in any suitable inanner, such as through equalizers. The elevator hitch beam 22 is supported on two up- '1 standing structural members 23 on either end of the elevatorplatform andextend some distance below the elevator platform 24. The elevator platform is supported on channel members 25 and 26 and is braced by the bracing members 27 and 28, extending to the lower end of the structural members 23. and held in: place by channels 29 and 30, upon which maybe mounted the usual safety devices. T/Bracing members 31 and 32'a-re also provided to lend rigidity to the elevatorplatform 24'. The counterweightsv 28 and 24' travel in suitable guides 33 in the usual manner. It should be noted that the hoisting cables 21: and 22 pass over counterweight 5.,shavesl34 and 35 afiixed to the floor of the 'pe'nt house. The elevator platform 24 is provided with suitable guide rails 36 and 37-, which are adapted to cooperate with. the usuallguiding shoes not shown, and is also provided with the usual emergency stopping mechanism for gripping the guide rails by means of the well known governor cable. It i will be seen that the structural members 23 supporting the elevator hitch beam are pro- 35 .vided at either. endof, the platform 24 and at about the middle. In; theconstruction underconsideration the platform is approximately fifteenfeet wide and tWenty-onefeet long .fwThe vehicle handling mechanism of 9 the type il'lustratedinfthe above cited'copend ing application is adapted to assume one of two positions on this platform on-either side' U i I i -n1'sm serves to-prevent end play. Furtherof the structural' members 23, I v

i r The clear line of the elevator hatch is shown in: dottedlines in Fig. 1, and'two doors are adaptedto b'e placed in the dotted positions 38 'and39 at oneend of the hatch and 40-a nd 41 attheotherendof the hatch, These doors may be of any wellknown or suitable construction andare operated by the usual door operating mechanism. The doors onone side oft-he hatch are adapted to be operated siinultaneously as'are the doors at the other side of the hatch. At the dotted position 41' on every floor, there is mounted a relatively largedoorwhich extends the full length of the elevator. This will permit the vehicle carrier of thetype shown in the above cited copending application, to be moved from 9 the elevator intoto-sideways. The provision of two-doors onevery floor on either end of thehatch permits a vehicle to be movedv infeither direction ofi the elevator platform 7 for either position; of the vehicle carrier.

The'construction of the elevator guides at the ends of the elevator platform and the mounting of the two counterweights on one side of the elevator hatch permits access to the elevator platform from three sides. This is absolutely necessary in an elevator that is adapted to be used in conjunction with the vehicle moving equipment illustrated in said prior application. 7 '2 I The use of two hoisting sheaves anda double set of cables enable the; structuralmembers of the elevator cage to be considerably lightened. In addition, since the power is applied at two separated points the load is distributed and there is less likelihood of the shifting load factor-causing any material strain or wear either on the hoisting mechani'sm or onthe elevator' 'gu'ide rails.

Attention directed to thejfact fthat the. elevator may be braked at four jdifierent points in the normal operatioi'1, that "is at the two drum brakes and the two coupling brakes. This permits a 'more'even distribution of the braking load; also if the mechanism should break at one point, the elevator is still under control. For example, if the 90 driving sheave should break away from the shaft the drum brake can stop its movement immediately. Thus, thesefour'bralfes provide four factors of safety inadditio'n t'othe' usual emergency safety device.

By braking the hoist-ing mechanism at four different points, the construction of the mechanism maybe considerably lighter, as the load is evenly distributed. 7 r

Attention is directed to the fact that since 103 theelevato'r platform 24 is carried by the 'two structural members 23 at either end thereof and hoisting cables are attached at two separated points, that there will be very littletendency forthe platform to 'tilt and cause the 1 5 this double connection of the hoisting'mechamore, since thefplatforin '24 is braced by the structural members. such as'27 and28,;the' i shifting of the load'from oneside'ofthelplat form 24 to the other side thereof, has no tend ency to tilt 'the platform, for It'her'eas'on that this load is carried directly back to 'thefstr-uctural' membersee'and the channelsf29and 80 5 comprising the usual safety d vicesu'pport.

It is to benotcd that-the platform 24 is. braced altogether from beneath and there. is no superstructure, except the usual hitch beam.v The varying load factor'is'thus transmitted directly through the bracing members beneaththe elevator platform tothe central structural members23. I The elimination of the superstructure makes the wholespace on the platform 24 available and this is particularly desirable for mechanical garage systems of the typeillustrated in-saidzp'rior application.

Another desirable result-v secured by the ar single motor interposed between two driving sheaves and the method of connecting the hoisting cables is that greater traction is secured since the cables contact the sheaves through the maximum angle. This eliminates wrapping the cables around the drum twice, thereby reducing the wear on the cables since suflicient traction can be secured by the arrangement shown. Again if only a single hitch connection should be used special car counterweights are necessary which are eliminated by the present arrangement.

My invention is not limited to the particular arrangement of apparatus illustrated and described but may be variously modified without departing from the spirit and scope thereof.

I claim:

1. In a building structure the combination of a plurality of floors, an elevator hatch extending vertically through the building, an elevator platform adapted to travel in said hatch, an elevator hoisting machine comprising a motor with a shaft extending on either side thereof, a driving sheave operatively connected to each extension, and a hoisting cable extending over each driving sheave and connected to said platform.

2. In a hoisting machine, a motor having shaft extending on either side thereof, a hoisting sheave on either side of said motor in spaced relation thereto and speed reducing mechanism of the spur gear type connecting each extension to the adjacent driving sheave.

In witness whereof, I hereunto subscribe my name this 3rd day of November, 1928.

SAMUEL E. BUETTELL. 

